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[" 102.The pH of a solution containing "0.4MHCO_(3)^(-)" and "0.2MCO_(3)^(2)" is : "],[qquad [[K_(a)(H_(2)CO_(3))=4times10^(-7);K_(a_(2))(HCO_(3)^(-))=4times10^(-11)]],[[" (a) "10.4," (b) "10.1," (c) "6.1]]]

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The pH of a solution containing 0.4 M HCO_(3)^(-) and 0.2 M CO_(3)^(2-) is : [K_(a1)(H_(2)CO_(3))=4xx10^(-7) , K_(a2)(HCO_(3)^(-))=4xx10^(-11)]

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